Vulcanizer.



M. W. OLSON.

VULGANIZER.

APPLICATION FILED MAR-.17, 1913.

Patented Aug. 18, 1914.

[NI/ENTUR.

WITNESSES container 2 and the rubber to be vulcanized is placed within flasks in said container, the top of which is then closed by thc'locking means, and an electric current turned onto the heating element 5, causing heat to be generated. This will convert the water, or apart thereof into steam. As is well known, to vulcanize rubber, especially for dental purposes, the temperature of the water and steam in the container must be maintained at a certain point and fora definite period of time. As the steam pressure increases it bears against the piston 16'. and when it has become sutliciently great the piston and rod will be thereby moved upwardly to move the rack 26 and actuate the pinion 33:2 to rotate the spindle lit and thereby the arm an to cut in more resistance in the heating elements circuit. by the elcctrical connection established through the wires li I and 5t .31 which are. connected in series with the heat in; element .3. his causes a change in the current flow and a similar change in the h at applied. thereby rcgulat ing or governing the temperature of the contents of the container. The operation of the blowotl' valve will be the usual one. as will also that of the sal'ety valve. The temperature of the contents of the container will be indicated by the thermometer 13.

The mechanical action caused by the steam pressure. in the container 2 upon the piston, causing it to raise. compress the resistance spring 20. and elevate the rack :26 to operate the pinion 32. spindle 2H, shoe or arm :29 and needle 3t) will be evident. To manually operate said shoe and needle avithout affecting,' the rack. the operator will push upon the button 3-? to thrust. the spindle 31 forwardly;and this carrying the shoe ".l with it will throw the pinion $52 o'nt of gear with the rack 2t), whereupon the button may be rotated to adjust the needle and sh e to any desired position. Adjustments of the. nut 24' will bring the sprin;

20 to the desired tension to resist the steampressnre on the valve 18.

llavin; thus described the nature of my invention, and having illustrated preferred in *ans for carrying, it into effect, I claim as new and desire to secure bv Letters Patent the followin namely:

1. In a vulcanizer. a hermetically sealed water-container. a source of electric supply lrcm' which it may be heated. a removable top for said container, means for locking it thereon, a cylinder in connnunication with said container. a piston operated by the tluid generated in said container and adapted to open and close communication between it and said cylinder. and a rheostat governed by said piston.

:2. In a vulcanizer. a hermetically sealed water container, at flask therein. a source of electric supply from which the contents of saidcontainermaybe heated. means for controlling the. amount of current. aml a piston for actuating the last recited element. the movement of said piston in one direction bein; controlled by the tluid generated in said container.

3. The combination in'a vulcanizer, of a hermetic:-tlly sealed water container, a removable steam-tight cover therefor, a hermetically sealed flask adapted to contain rubber to be vulcanizetl, disposed in the tluid contained in said water container, a source of electric supply from which said water and thereby the contents of said flask may be heated, an element movable by the tluid generated in said container, and means for controlling the amount of current.

in witness whereof I hereunto subscribe my name. in the city. county and State above written. thisflfith day of l ebruany, lSIlIS.

Wit nesses:

II. M. RHHARDS, h. RHIIARHS. 

